Novel precise weighing device

The utility model relates to the technical field of paper detection, in particular to a novel precise weighing device, which comprises a first conveying belt, a second conveying belt and a third conveying belt, the first conveying belt is mounted on a frame and used for weighing products, the second conveying belt is used for removing unqualified products, the third conveying belt is used for conveying qualified products, and a collecting mechanism for collecting the unqualified products is further arranged on the frame. And the collecting mechanism comprises a guide plate, a moving plate and a collecting box, the guide plate is fixed below the second conveying belt through a supporting frame, the moving plate is slidably connected to the rack, and the two sides of the moving plate are fixedly connected with limiting sliding rods for limiting the sliding path. Through the arrangement of the collecting assembly, in the batch weighing and detecting process of the products, the time wasted by cleaning unqualifie